Separable fastener



Nov. 27, 1928. w 1,693,143

D. DYRESEN S EPARABLE FAS TENER Filed Dec. 20, 1924 Inventor.- flz'dntok 17y res en,

Patented Nov. 27, 1928.

UNITED STATES 1,693,143 PATENT OFFICE.

DIDRICK DYRE SEN, F MALDEN, MASSACHUSETTSJ SEPARABLE FASTENER.

Application filed December 20, 1924. Serial No. 757,155.

This invention aims to provide an improved separable fastener. e

In the drawings, which illustrate a preferred embodiment of my invention Figure 1 is a front elevation of the ferred form of fastener;

Fig. 2 is a section on the line 22 of Fig. 1, being partly in elevation;

Fig. 3 is a section similar to Fig. 2, but showing the relative positions of the stud and socket during engagement thereof;

Fig. 4 is a rear elevation of thesocket;

Fig. 5 includes a front, a side and a rear elevation respectively of the stud; and

Fig. 6 is a section on the line 6-6 of Fig. 1.

Referring to the drawings, I have shown a three-side lock fastener which includes a flush type stud and a socket which may be of any one of several well known types of threeside lock fastener sockets.

The stud, as illustrated, includes a casing 1, secured to a support 2, which may be the body of an automobile, by an attaching screw 3 secured to the casing in substantially the pre- ' same manner as set forth in my co-pending application Serial No. 757,154, filed herewith. The casing presents at its outer end a flange 4 which seats against the outer face of the support 2. Instead of providing the flange 4 with a hexagonal periphery as in the abovementioned co-pending application, I have provided the casing with a hexagonal toolreceiving portion 5 which extends beyond the flange 4 to receive a tool, such as a socket wrench for securing the casing 1 to the support 2. The stud also includes a socket-engaging part having a head 6, a neck 7, a shank portion 8 and base portion 9, as shown in Figs. 2 and 3, the shank portion and the greater portion of the neck of the socket-engaging part being normally surrounded by the casing 1 and held in position by a spring 10 interpdsed between the base 9 of the socketengaging part and a depending flange 11 located at the outer end of the casing. Thus only the head and a portion of the neck of the socket-engaging part extend beyond the casing 1, prior to engagement wit-h a suitable socket, as illustrated in Fig. 5.

Vhile I may use any one of several types of three-side lock fastener sockets, which may be secured to a flexible curtain, I prefer to provide a socket similar to the one referred to in the above-mentioned co-pending application. In this instance, however, the

socket casing 12 presents a relatively large aperture 13 in the face thereof, the purposes of which are more fully hereinafter described. lVithin the casing, I have provided a plurality of resilient jaws 14 and a fixed jaw 15 tween the head and neck of the socket-engag ing part. Thus the aw 15 will wedge or pull the socket-engaging part out of the casing 1 so that the entire neck will be exposed beyond the face of the stud casing 1. The resilient jaws 14, which have been expanded by the head 6, may then engage the neck 7 of the socket-engaging part and urge the fixed jaw 15 into engagement with the neck of the stud, as illustrated in Fig. 2. The stud and socket will then be locked together against separation by various strains exerted at three sides thereof in substantially the same manner as set forth in the above-mentioned application.

Separation of the socket from the stud is effected by grasping the lower edge of the curtain and exerting a slight outward pull thereon. This action causes the fixed jaw 15 to pull the socket-engaging part outwardly relative to the casing 1, so that the socket may tip relative to the socket-engaging part to permit the head 6 thereof to pass between the jaws 14 and 15.. The spring 10 thereafter returns the socket-engaging part to its normal position.

While I have shown and described a preferred embodiment of my invention, it will be understood that changes involving omission, substitution, alteration and reversal of parts, and even changes in the mode of operation, may be made without departing from the scope of my invention, which is best defined in the appended claims.

I claim:

1. A flush ty e stud comprising a casing having an attaching screw secured in a fixed relation to the inner end thereof, a flange adjacent the outer end thereof to seat against the front face of a support and a tool-receiving portion beyond said flange for receiving tion, a casing part, a socket-engaging part axially shiftable relative to said casing part,

i said socket-engaging pai'tpresenting a head and a'neck, and spring means interposed between an abutment presented by the casing and an abutment presented by the socket-engaging part thereby normally pressing said socket-engaging part inwardly relative to the casing, and means cooperating beyond the socket-engaging part and the casing part to limit the inward movement of the socket-engaging part whereby only the head and a portion of the neck of the socket-engaging part are IIOIHHLlly'GXPOSGd beyond the outer end of said casing part. i

In testimony whereof, I have signed my name to this specification.

DIDRICK DYRESEN. 

